A connecting structure for an integration panel and a fluid device in which an excellent sealing property can be held even when substantially no further fastening is performed, and the assembling workability is improved is provided. When an integration panel 1 and a valve 2 are to be communicatingly connected to each other in a sealed state through single circular pipe-like fluid passages 3, 7 by using an annular gasket G, annular projections 11, 21 are formed in first and second fluid supply/discharge port portions 1A, 2A, the gasket G is configured by a fluororesin having a pair of annular grooves 51, 51 which are formed in an outer-diameter portion of a fluid path W to be fitted to the annular projections 11, 21, respectively, and holding means I for holding a joined state is equipped. In the joined state, the integration panel 1 and the valve 2 are attracted to each other, and the annular projections 11, 21 of the first and second fluid supply/discharge port portions 1A, 2A are fitted respectively to the annular grooves 51 of the gasket G to form a fitting sealing portion.